Add,delete,Update in LISTS

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package sp10.bsb.pkg013;

import java.util.*;
import java.util.Scanner;
/**
 *
 * @author Hira
 */
public class SP10BSB013 {
      static  List<Integer> l=new ArrayList<Integer>();
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
     boolean y=true;  
     do{   
         System.out.println(\"Enter 1 to add a no.(non zero) in list\\n2 to edit no.\\n3 to search\");
         System.out.println(\"4 to delete\\n5 to check total no.\\n6 to print list\\n7 to exit\");
         System.out.println(\"enter your choice\");
         int choice=in.nextInt();
         switch(choice)
         {
            case 1:
                insert();
                break;
            case 2:
                edit();
                break;
            case 3:
                search();
                break;
            case 4:
                delete();
                break;
            case 5:
                total();
                break;
            case 6:
                print();
                break;
            case 7:
                toexit();
                break;
            default:
                System.out.println(\"bad input\");
                break;
        }
        System.out.println(\"want to process more? y/n\");
        String x=in.next();
        char ch=x.charAt(0); 
        if( ch==\'n\')
            y=false;
    }
    while(y!=false);

    }

    //*************************************************************************************

   static public void insert(){


       Scanner in=new Scanner(System.in);

        boolean y=true;
       do{
            System.out.println(\"enter no to add in list\");
            int num=in.nextInt();
            if(num==0)
                System.out.println(\"0 is not alowed\");
            else
                l.add(num);
            System.out.println(\"want to insert more?y/n\");
            String x=in.next();
            char ch=x.charAt(0);
            if( ch==\'n\')
                y=false;
         }
       while(y!=false); 
   }

  //*************************************************************************************8 

   static public void print(){


       if(l.isEmpty())
           System.out.println(\"list is empty \");
       else
            System.out.println(\"members of lists are:\");
            for(int i=0 ; i<l.size();i++)
                System.out.println(\"index \"+i+\" : \"+ l.get(i)+\" \");

   }

   //********************************************************************************


   static public void search(){

       //List<Integer> I=new ArrayList<Integer>();
       System.out.println(\"enter no to search\");
       Scanner in=new Scanner(System.in);

       int num=in.nextInt();
       for(int i=0;i<l.size();i++){
           if(l.get(i)==num)
                System.out.println(num+\" is  PRESENT at Index \"+i);
       }

       if(l.lastIndexOf(num)==-1)
               System.out.println(num+\" is NOT PRESENT\");
   }

   //*****************************************************************************8


   static public void edit(){


       Scanner in=new Scanner(System.in);
       int num1,num2;
       System.out.println(\"enter no you want to add\");
       num2=in.nextInt();
       if(num2==0)
             System.out.println(\"0 is not alowed\");
       else{
             try{
                System.out.println(\"enter position you want to edit\");
                num1=in.nextInt();
                l.set(num1, num2);
             }catch(IndexOutOfBoundsException e){
                    System.err.println(\"caught IndexOutOfBoundsException: specified position is empty \"+e.getMessage());
               }

          }
   }


    //************************************************************************************************8



    static public void delete(){


        Scanner in=new Scanner(System.in);
        System.out.println(\"enter position you want to delete\");
        int num=in.nextInt();
        l.remove(num);

    }


     //***********************************************************************88


    static public void total(){


        System.out.println(\"total no. in list are \"+ l.size());
    }

    //******************************************************************************


    static public void toexit(){

        System.exit(0);
    }
}